2005 Lotus Elise 2dr Convertible on 2040-cars

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This is how ground effects work in a nutshell

There are two ways to generate downforce. One is with all manner of wings and spoilers on the surface of the vehicle. The other is with ground effects. One you can clearly see, the other remains something of a hidden mystery. Fortunately, the good folks at Lotus and Goodwood are here to dumb it down for us non-engineer types. It's called Bernoulli's Principle, named after Swiss physicist Daniel Bernoulli who literally wrote the book on the subject way back in the 1700s. Countless engineers have spent their careers focused on its study and application, but the crux of the matter is that, as the speed of air (or other "fluid") increases, pressure decreases. Play with the air's increasing speed and decreasing pressure just right and you can generate downforce underneath the body of a car without significantly increasing drag as you would with surface spoilers. For evidence of how Bernoulli's Principle applies in practical terms, just look at the last Ferrari to pack a turbocharged V8 in the middle and the latest one. The F40 had a giant wing on the back, where the 488 GTB has none. But because the 488 uses underbody aerodynamics (or "ground effects"), it generates significantly more downforce than the winged F40 ever could, and at lower speeds. Ferrari, however, was not the first outfit to harness the power of ground effects. Lotus did with the legendary 79 that Mario Andretti drove to the world championship back in 1978. That was the genius of Colin Chapman, and to explain how it all works in layman's terms, our friends over at Goodwood Road & Racing brought in Colin's son Clive Chapman, head of Classic Team Lotus, to put together the video above. Related Video:

Lotus announces race-ready Exige V6 Cup and Cup R

Lotus has pulled off the wraps on two new versions of the Exige: the V6 Cup and the V6 Cup R. Based on the Exige S, the V6 Cup is built to be a dual-purpose street and track machine. The 0-60 dash should take just under 3.8 seconds thanks to a full 345 horsepower from a supercharged 3.5-liter V6 engine. Weighing in at 2,380 pounds, the V6 Cup should be an absolute riot to drive, and with a full FIA-approved roll cage, fire extinguisher and six-point race harnesses on board, it's plenty safe, too. Two-way adjustable dampers are standard, as are AP Racing four-piston calipers on all four corners. More importantly, drivers can expect to find the Lotus Dynamic Performance Management system in the cockpit, complete with Touring, Sport and DPM Off modes.
The V6 Cup R, meanwhile, is both lighter and offers more horsepower than the standard V6 Cup. The same blown V6 dishes out 366 horsepower in R trim, and the whole contraption tips the scales at 2,292 pounds. Of course, the same spate of race hardware is stock, minus the DPM system. A lightweight battery, track-spec tow loops and quick-release engine cover help separate the Cup R from its more civil sibling, as do performance brake pads and better oil and water cooling systems.
Check out the brief press release below for more information. Both of the new models are headed for a debut at the 2013 Autosport International Show.

Lotus Exige V6 Cup takes extreme to the extreme

What separates a road car from a race car? You're looking at it. It's the Lotus Exige V6 Cup, a model based on what is already one of the most hardcore performance machines on the road, albeit upgraded to an even harder-core spec. It's a good 130 pounds lighter than the Exige S (a vehicle which didn't have much flab to trim in the first place) and can hit 60 in under four seconds. With the notably exception of certain versions of the Porsche 911, there aren't a lot of six-cylinder cars that can claim that kind of performance.
In fact, the Exige V6 Cup is so close to race spec that it's already eligible for a number of racing series. Just bolt in the removable FIA-certified roll cage, maybe swap on some slick tires and you're good to go. Then you can drive it home again when you're done, just like in sports car racing's heyday. But don't take our word for it: the team over at XCar took the V6 Cup to the UK's Goodwood circuit to see how it compared to the Exige S it recently drove, and you can view the stirring results in the video below.